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What is SMD?

by konschubert 9y ago

What is SMD?

nasalgoat 9y ago
He probably means SMT - surface mount technology.
- dsr_ 9y ago
  SMT is the technology; individual devices are SMDs, or "surface-mounts" or "surface-mounted". Beyond terminology, SMD are much harder for an individual hobbyist to desolder, replace and resolder than through-mount, but they are easier for pick-and-place machines to deal with. If you're prototyping a simple device, you can start with a breadboard -- no soldering. Then you can get a circuit board printed to your spec and use the same components, for low-volume work. If you need high-precision placement, you will probably need to transition to surface-mount.
  - jonhendry18 9y ago
    "Beyond terminology, SMD are much harder for an individual hobbyist to desolder, replace and resolder than through-mount, but they are easier for pick-and-place machines to deal with." And SMD are smaller, allowing smaller circuit boards and smaller devices.
graystevens 9y ago
Surface Mounted Device/Technology (https://en.m.wikipedia.org/wiki/Surface-mount_technology https://en.m.wikipedia.org/wiki/Surface-mount_technology)
gsteinb88 9y ago
Surface mount device: https://en.wikipedia.org/wiki/Surface-mount_technology https://en.wikipedia.org/wiki/Surface-mount_technology
diabeetusman 9y ago
Surface Mount Device; sort of the opposite of through-hole, they're both soldering and electronics mounting methods. https://en.wikipedia.org/wiki/Surface-mount_technology https://en.wikipedia.org/wiki/Surface-mount_technology
jburgess777 9y ago
Surface Mount Device. The name given to components which are soldered directly to the surface of the PCB (printed circuit board). SMD devices are very common now and replace older components which had legs (or leads) which had to pass through holes in the circuit board, also known as "leaded components" or through-hole.
wlesieutre 9y ago
Adding to the other comments, this is in contrast to "through hole" components with leads that poke through holes and are soldered to pads on the reverse side of the board.

What is SMD?

nasalgoat 9y ago

He probably means SMT - surface mount technology.

dsr_ 9y ago
SMT is the technology; individual devices are SMDs, or "surface-mounts" or "surface-mounted". Beyond terminology, SMD are much harder for an individual hobbyist to desolder, replace and resolder than through-mount, but they are easier for pick-and-place machines to deal with. If you're prototyping a simple device, you can start with a breadboard -- no soldering. Then you can get a circuit board printed to your spec and use the same components, for low-volume work. If you need high-precision placement, you will probably need to transition to surface-mount.
- jonhendry18 9y ago
  "Beyond terminology, SMD are much harder for an individual hobbyist to desolder, replace and resolder than through-mount, but they are easier for pick-and-place machines to deal with." And SMD are smaller, allowing smaller circuit boards and smaller devices.

graystevens 9y ago

Surface Mounted Device/Technology (https://en.m.wikipedia.org/wiki/Surface-mount_technology https://en.m.wikipedia.org/wiki/Surface-mount_technology)

gsteinb88 9y ago

Surface mount device: https://en.wikipedia.org/wiki/Surface-mount_technology https://en.wikipedia.org/wiki/Surface-mount_technology

diabeetusman 9y ago

Surface Mount Device; sort of the opposite of through-hole, they're both soldering and electronics mounting methods. https://en.wikipedia.org/wiki/Surface-mount_technology https://en.wikipedia.org/wiki/Surface-mount_technology

jburgess777 9y ago

Surface Mount Device. The name given to components which are soldered directly to the surface of the PCB (printed circuit board). SMD devices are very common now and replace older components which had legs (or leads) which had to pass through holes in the circuit board, also known as "leaded components" or through-hole.

wlesieutre 9y ago

Adding to the other comments, this is in contrast to "through hole" components with leads that poke through holes and are soldered to pads on the reverse side of the board.